en.wikipedia.org/wiki/Binding_of_Isaac

The available scholarly descriptions of the Genesis Apocryphon describe it as a work with separate narrative sections, not a scene where Lamech and Abraham speak to each other.

• Matthias Weigold’s abstract on the text says that “Lamech, Noah, and Abram in turn act as first person narrator” and that the material before Abram consists of the Noah-birth account and the “Book of the Words of Noah.” That means these are successive narrative voices, not a dialogue between Lamech and Abraham.
• The Center for Online Judaic Studies summarizes the preserved columns more explicitly: columns 2–5 feature the Noah-birth story with Lamech as protagonist, columns 6–17 recount Noah’s story, and from column 18 the scroll tells the story of Abraham. That layout directly contradicts the claim that Lamech “converses with Abraham.”

So the article sentence appears to have merged true facts about the text’s different narrators into a false statement about a direct conversation between two figures who appear in different sections.